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–+ servings
Lemon Blueberry French Toast Casserole
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Lemon Blueberry French Toast Casserole

Soft, golden, and filled with lemon and blueberries, this easy French toast casserole is the perfect make-ahead breakfast for spring mornings and brunch gatherings.
Prep Time20 minutes
Cook Time45 minutes
Total Time1 hour 5 minutes
Course: Breakfast
Cuisine: American, French
Keyword: Easy overnight lemon blueberry french toast, French toast casserole, Lemon blueberry french toast, Overnight french toast casserole
Servings: 8 people
Author: Silvia Dunnirvine

Ingredients

  • 1 loaf sourdough sliced bread cubed
  • 16 oz buttermilk
  • 1/2 cup honey
  • 2 tsp vanilla extract
  • 8 eggs
  • 2 tsp lemon zest
  • 2 cups blueberries

Instructions

  • Preheat the oven to 350°F and lightly grease a baking dish.
  • Prepare the bread by slicing or tearing the soft sourdough into thick pieces, then arrange them evenly in the baking dish.
  • Make the custard in a large mixing bowl by whisking together the buttermilk, honey, vanilla extract, eggs, and lemon zest until smooth and well combined.
  • Add the blueberries by scattering them evenly over and in between the bread pieces.
  • Pour the custard mixture evenly over the bread, making sure all the pieces get coated. Gently press the bread down with the back of a spoon or spatula so it can soak up the liquid.
  • Let it rest for about 15 to 20 minutes so the bread has time to absorb the custard. For an overnight version, cover and refrigerate, then bake the next morning.
  • Bake uncovered for 45 minutes, or until the top is lightly golden and the center looks set.
  • Let it cool slightly for about 5 to 10 minutes before serving. This helps the casserole set and makes it easier to slice.
  • Serve warm as is, or top with extra blueberries, a drizzle of honey, lemon zest, mint leaves or a dusting of powdered sugar if desired.

Notes

  • Use soft sourdough, not a crusty artisan loaf, so it absorbs the custard well.
  • The casserole should look set in the center and lightly golden on top when done.
  • Resting before serving gives you the best texture.

💛 Silvia’s Tip

This casserole reheats beautifully, especially in the oven. the edges crisp up again while the center stays soft and custardy.

Nutrition

Calories: 341kcal | Carbohydrates: 56g | Protein: 14g | Fat: 8g | Saturated Fat: 3g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 0.02g | Cholesterol: 170mg | Sodium: 464mg | Potassium: 245mg | Fiber: 2g | Sugar: 27g | Vitamin A: 351IU | Vitamin C: 4mg | Calcium: 124mg | Iron: 3mg